question_answer

A thin prism of angle \[15{}^\circ \] made of glass of refractive index \[{{\mu }_{1}}=1.5\] is combined with another prism of glass of refractive index \[{{\mu }_{2}}=1.75\]. The combination of the prism produces dispersion without deviation. The angle of the second prism should be [AIPMT (M) 2011]

A)  \[7{}^\circ \]               

B)       \[10{}^\circ \]

C)  \[12{}^\circ \]          

D)  \[5{}^\circ \]

Correct Answer: B

Solution :

For without deviation